public int Exec(ref Guid pguidCmdGroup, uint nCmdID, uint nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
{
char typedChar = char.MinValue;
if (pguidCmdGroup == VSConstants.VSStd2K && nCmdID == (uint)VSConstants.VSStd2KCmdID.TYPECHAR)
{
typedChar = (char)(ushort)Marshal.GetObjectForNativeVariant(pvaIn);
if (typedChar.Equals('(') && (m_session == null || m_session.IsDismissed))
{
//move the point back so it's in the preceding word
SnapshotPoint point = m_textView.Caret.Position.BufferPosition - 1;
TextExtent extent = m_navigator.GetExtentOfWord(point);
string word = extent.Span.GetText();
m_session = m_broker.CreateSignatureHelpSession(m_textView, m_textView.TextSnapshot.CreateTrackingPoint(point.Position, PointTrackingMode.Positive), true);
m_session.Properties.AddProperty("word", word);
m_session.Start();
}
else if (typedChar.Equals(',') && (m_session == null || m_session.IsDismissed))
{
int paramPos;
int pos = m_textView.Caret.Position.BufferPosition - 1;
while (pos > 0 && m_textView.TextSnapshot[pos] != '(')
{
pos--;
}
if (pos > 0)
{
paramPos = pos;
pos--;
while (pos > 0 && char.IsWhiteSpace(m_textView.TextSnapshot[pos]))
{
pos--;
}
if (pos > 0)
{
SnapshotPoint point = new SnapshotPoint(m_textView.TextSnapshot, pos);
TextExtent extent = m_navigator.GetExtentOfWord(point);
string word = extent.Span.GetText();
m_session = m_broker.CreateSignatureHelpSession(m_textView, m_textView.TextSnapshot.CreateTrackingPoint(m_textView.Caret.Position.BufferPosition - 1, PointTrackingMode.Positive), true);
m_session.Properties.AddProperty("word", word);
m_session.Properties.AddProperty("span", new Span(paramPos, m_textView.Caret.Position.BufferPosition - paramPos));
m_session.Start();
}
}
}
else if (typedChar.Equals(')') && m_session != null)
{
m_session.Dismiss();
m_session = null;
}
else if (m_session != null && m_session.IsDismissed)
{
m_session = null;
}
}
return(m_nextCommandHandler.Exec(ref pguidCmdGroup, nCmdID, nCmdexecopt, pvaIn, pvaOut));
}
public void PresentItems(
ITrackingSpan triggerSpan,
IList <SignatureHelpItem> signatureHelpItems,
SignatureHelpItem selectedItem,
int?selectedParameter)
{
_signatureHelpItems = signatureHelpItems;
_selectedItem = selectedItem;
// Create all the editor signatures for the sig help items we have.
this.CreateSignatures(triggerSpan, selectedParameter);
// It's a new list of items. Either create the editor session if this is the
// first time, or ask the editor session that we already have to recalculate.
if (_editorSessionOpt == null)
{
// We're tracking the caret. Don't have the editor do it.
_editorSessionOpt = _sigHelpBroker.CreateSignatureHelpSession(
_textView,
triggerSpan.GetStartTrackingPoint(PointTrackingMode.Negative),
trackCaret: false);
_editorSessionOpt.Dismissed += (s, e) => OnEditorSessionDismissed();
_editorSessionOpt.SelectedSignatureChanged += OnSelectedSignatureChanged;
}
// So here's the deal. We cannot create the editor session and give it the right
// signatures (even though we know what they are). Instead, the session with
// call back into the ISignatureHelpSourceProvider (which is us) to get those
// values. It will pass itself along with the calls back into
// ISignatureHelpSourceProvider. So, in order to make that connection work, we
// add properties to the session so that we can call back into ourselves, get
// the signatures and add it to the session.
if (!_editorSessionOpt.Properties.ContainsProperty(s_augmentSessionKey))
{
_editorSessionOpt.Properties.AddProperty(s_augmentSessionKey, this);
}
try
{
// Don't want to get any callbacks while we do this.
_ignoreSelectionStatusChangedEvent = true;
_editorSessionOpt.Recalculate();
// Now let the editor know what the currently selected item is.
Contract.Requires(_signatureMap.ContainsKey(selectedItem));
Contract.ThrowIfNull(_signatureMap);
var defaultValue = _signatureMap.GetValueOrDefault(_selectedItem);
if (_editorSessionOpt != null)
{
_editorSessionOpt.SelectedSignature = defaultValue;
}
}
finally
{
_ignoreSelectionStatusChangedEvent = false;
}
}
private void StartSignatureSession()
{
if (_currentSignatureSession != null)
{
return;
}
if (_signatureHelpBroker.IsSignatureHelpActive(_textView))
{
_currentSignatureSession = _signatureHelpBroker.GetSessions(_textView)[0];
}
else
{
var point = _textView.Caret.Position.BufferPosition;
var snapshot = point.Snapshot;
var trackingPoint = snapshot.CreateTrackingPoint(point, PointTrackingMode.Positive);
_currentSignatureSession = _signatureHelpBroker.CreateSignatureHelpSession(_textView, trackingPoint, true);
_textView.TextBuffer.Properties.AddProperty(typeof(ISignatureHelpSession), _currentSignatureSession);
}
_currentSignatureSession.Dismissed += SignatureSessionDismissed;
_currentSignatureSession.Start();
}
internal bool StartSignatureSession(bool comma, IXTypeSymbol type = null, string methodName = null, char triggerchar = '\0')
{
WriteOutputMessage("StartSignatureSession()");
if (_signatureSession != null)
{
return(false);
}
IXMemberSymbol currentElement = null;
SnapshotPoint ssp = this._textView.Caret.Position.BufferPosition;
if (triggerchar == '(' && ssp.Position < ssp.Snapshot.Length && ssp.GetChar() == ')')
{
ssp -= 1;
}
var location = _textView.FindLocation(ssp);
if (location == null || location.Member == null)
{
return(false);
}
if (location.Member.Range.StartLine == location.LineNumber)
{
return(false);
}
var props = new XSharpSignatureProperties(location);
props.triggerChar = triggerchar;
props.triggerPosition = this._textView.Caret.Position.BufferPosition.Position;
if (type != null && methodName != null)
{
var findStatic = triggerchar == '.';
currentElement = XSharpLookup.SearchMethod(location, type, methodName, Modifiers.Private, findStatic).FirstOrDefault();
}
else
{
currentElement = findElementAt(comma, ssp, props);
}
if (currentElement == null)
{
return(false);
}
SnapshotPoint caret = _textView.Caret.Position.BufferPosition;
ITextSnapshot caretsnapshot = caret.Snapshot;
//
if (_signatureBroker.IsSignatureHelpActive(_textView))
{
_signatureSession = _signatureBroker.GetSessions(_textView)[0];
}
else
{
_signatureSession = _signatureBroker.CreateSignatureHelpSession(_textView, caretsnapshot.CreateTrackingPoint(caret, PointTrackingMode.Positive), true);
}
_signatureSession.Properties[typeof(XSharpSignatureProperties)] = props;
if (location.Member.Kind.IsGlobalTypeMember())
{
props.Visibility = Modifiers.Public;
}
else
{
props.Visibility = Modifiers.Protected;
}
_signatureSession.Dismissed += OnSignatureSessionDismiss;
props.Element = currentElement;
if (comma)
{
var tokenList = XSharpTokenTools.GetTokenListBeforeCaret(location, out var state);
bool done = false;
int nested = 0;
for (int i = tokenList.Count - 1; i >= 0 && !done; i--)
{
var token = tokenList[i];
switch (token.Type)
{
case XSharpLexer.LPAREN:
case XSharpLexer.LCURLY:
case XSharpLexer.LBRKT:
done = nested == 0;
if (done)
{
props.Start = token.Position;
props.Length = _textView.Caret.Position.BufferPosition.Position - token.Position;
}
nested -= 1;
break;
case XSharpLexer.RPAREN:
case XSharpLexer.RCURLY:
case XSharpLexer.RBRKT:
nested += 1;
break;
}
}
}
else
{
props.Start = ssp.Position;
props.Length = _textView.Caret.Position.BufferPosition.Position - ssp.Position;
}
try
{
_signatureSession.Start();
}
catch (Exception e)
{
XSettings.LogException(e, "Start Signature session failed:");
}
//
return(true);
}
